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LRR 1-52, LRR 1-53, URB 55 - Installation & Operating Manual -
850645-01
System malfunctions - URB 55
Display of system malfunctions in the alarm and error list using fault codes
Fault codes for the LRR 1-52 / LRR 1-53 conductivity controllers
Fault code
Possible faults
Remedy
LRR Offline
No power supply
Check data line (terminals 11 + 12)
LRR NodeID
Wrong configuration
Set node ID (DIP 2) to ON, as there are two controllers
A.001
Above MAX switchpoint
-
A.002
Below MIN switchpoint
-
E.001
Below temperature sensor meas-
uring range
Check Pt100 temperature sensor and replace if necessary
Check electrical connection
E.002
Above temperature sensor meas-
uring range
Check Pt100 temperature sensor and replace if necessary
Check electrical connection
or
Switch off temperature compensation
E.005
Faulty conductivity electrode,
measuring voltage < 0.5 V DC
Check conductivity electrode and replace if necessary
Check electrical connection
Faulty conductivity transmitter,
measuring current < 4 mA
Check conductivity transmitter and replace if necessary
Check electrical connection
E.001
Faulty conductivity electrode,
measuring voltage > 7 V DC
Check conductivity electrode and replace if necessary
Check electrical connection
Faulty conductivity transmitter,
measuring current > 20 mA
E.011
Calibration points implausible/
wrong way round
Valve: CLOSED (0 %) > OPEN
(100 %)x
Recalibrate the potentiometer in the continuous blowdown valve
E.012
Lower and upper bounds of meas-
uring range changed round
Reset measuring range
E.013
Switchpoints implausible
MIN > MAX
Reset the switchpoints
All fault codes from E.001 to E.027 not listed here are available as reserves
Fig. 24
